Fuel box of fuel cell with B compound as fuel

Abstract

The present invention relates to a fuel tank of fuel cell using B compound as fuel, belonging to the field of fuel cell technology. Said fuel tank is mainly characterized by that it has a mixed liquid inlet tube mounted in the lower portion of one side of the fuel tank, and has a pure BH4- discharge tube mounted on another side of the fuel tank, and the interior of its tank body is divided into a mixed liquid storage chamber for storing mixed liquid formed from BH4-, BO2- and 2H2O, etc. which are flowed into the storage chamber from mixed liquid inlet tube and a pure fuel storage chamber for storing BH4- by means of fuel partion board with a certain height. Said fuel tank can only make the pure fuel BH4- be supplied into the interior of cell pile by means of discharge tube so as to raise its power generation performance.

Description

technical field [0001] The invention belongs to the field of fuel cell and its manufacture, and relates to the invention of fuel cell which supplies fuel and air from outside to perform electrochemical reaction to generate electricity. In more detail it is about being able to prevent BH from being supplied to the battery stack 4 - The invention of the fuel tank of the fuel cell where the concentration changes drastically. Background technique [0002] Generally, a fuel cell is a device that directly converts fuel energy into electrical energy. This fuel cell is centered on a polymer electrolyte membrane, and porous anodes and cathodes are closely attached to its two sides. The electrochemical oxidation of hydrogen fuel occurs on the anode (oxidation electrode or fuel electrode), and the electrochemical reduction of oxidant oxygen occurs on the cathode (reduction electrode or air electrode). At this time, electricity is generated by the movement of generated electrons. [...

AI Technical Summary

Problems solved by technology

[0005] However, prior art using BH 4 - Fuel cell used as fuel, BH in aqueous solution state stored in the fuel tank 4 - mixed with BO that is recovered after reacting with air in the battery stack 2 - , whose BO 2 - than BH 4 - The specificity is large, so there is a large amount of BO in the lower side of the fuel tank 2 - , therefore, when the fuel tanks are alternated, after a certain period of time, the BO present on the bottom of the fuel tanks 2 - A large amount is supplied to the cell stack through the fuel supply pipe connected to the lower side, so there is a problem of lowering the power generation efficiency

[0006] In addition, the presence of BO at the bottom of the same fuel tank as described above 2 - , its concentration also increases with time, as it solidifies, also causing the problem of clogging the supply pipes on the underside

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